Re: [Avid-L2] Re: file based QC

Seen this?

http://community.avid.com/forums/p/116677/674767.aspx

leaves a lot to be desired IMO…


On Wed, Apr 3, 2013 at 9:15 PM, johnrobmoore <bigfish@pacbell.net> wrote:

> **
>
>
> All my color correction starts with 16-235 master curve and then I color
> correct from there. In the end I use safe color set to 422, 16-235 and I've
> had no QC issues. Not sure what inconsistencies you are see but there are
> always some specular excusions that can set off the Tek alarm when the
> error area parameter is set to 1 percent. I agree 16 to 235 might be
> aggrerssive but it generally gets thing through the QC jungle. I also stop
> at every stop sign and red light in California, so maybe I'm too cautious.
> No one at home is complaining.
>
> --- In Avid-L2@yahoogroups.com, Dylan Reeve <dylan@...> wrote:
> >
> > As a slight tangent to this then - what are you using to legalise video
> for
> > file-based delivery?
> >
> > I've found the Avid Safe Color effect to be, uh, inconsistent. Although
> > applying a Color Correction with 16-235 levels set on the curves does
> seem
> > to work, it also seems a little aggressive?
> >
> > Every single clip I've put through Resolve comes out peachy - so I did
> > consider rendering everything trough that.
> >
> > I'm checking with a Tek WFM5000 scope.
> >
> > Dylan Reeve
> > http://dylanreeve.com/
> >
> >
> > On Thu, Apr 4, 2013 at 11:52 AM, jeffsengpiehl <jeffsengpiehl@...>wrote:
>
> >
> > > **
> > >
> > >
> > > There's really no reason not to put eyeballs on it- Tho I've found some
> > > deliverables (XDCAM 50 at 60FPS) won't AMA, so FCP playout it is.
> > >
> > > JDS
> > >
> > >
> > > --- In Avid-L2@yahoogroups.com, "johnrobmoore" <bigfish@> wrote:
> > > >
> > > > I still like to take my file and ama link and play back through my
> > > tektronix scope with error log running. I feed LTC out of avid so it
> can be
> > > logged by time code. Cerify and other file based apps can be used but I
> > > haven't been able to spot level issues with the accuracy I can through
> the
> > > traditional HDSDI analysis. The apps do look for data and format errors
> > > unique to files so they are valuable too but when it comes to levels of
> > > video I prefer to rely on the scope. Usually I've found a sequence
> that is
> > > in spec out of the Avid rarely has level issues introduced when
> exporting
> > > the file as long as I export a QT ref our of Avid and Use QT Pro to
> make
> > > Prores delivery files. Of course with the myriad of possible file
> creation
> > > workflows a pandora's box of problems can arise which is why I still
> like
> > > to link back ama to the file and play it down through Avid to check the
> > > actual essence of the file. It has been my experience and understanding
> > > that an ama link bypasses the QT engine now and I hope other aspects of
> > > file processing to avoid being fooled by an misinterpreted file level.
> The
> > > classic confusion of RGB vs. 601/709 seems to be the most common
> mismatch.
> > > With ama I get to see the actual essence levels as I understand it. HTH
> > > >
> > > > --- In Avid-L2@yahoogroups.com, Steve Hullfish <steve4lists@> wrote:
> > > > >
> > > > > Or come visit the booth I'll be at at NAB and check out Tektronix
> > > Cerify. It does QC on filebased delivery. File-based content analysis.
> > > > >
> > > > > This does exactly what you are asking for
> > > > >
> > > > >
> > >
> http://www.tek.com/file-based-content-analyzer/cerify-video-content-analysis
> > > > >
> > > > > (Disclaimer: I am an occasional vendor to Tektronix)
> > > > >
> > > > > Steve Hullfish
> > > > > contributor: www.provideocoalition.com
> > > > > author: "The Art and Technique of Digital Color Correction"
> > > > >
> > > > > On Apr 3, 2013, at 1:33 PM, jeffsengpiehl <jeffsengpiehl@> wrote:
> > > > >
> > > > > >
> > > > > > Not a scope, but there are applications that will process the
> file
> > > and find issues like those. I'd recommend Aurora By Digi-Metrics
> > > > > >
> > > > > > JDS
> > > > > > --- In Avid-L2@yahoogroups.com, Jeff Hedberg <jeff@> wrote:
> > > > > > >
> > > > > > > I tried searching the group for this - but I'm clearly using
> the
> > > wrong search terms.
> > > > > > > Didn't someone recently mention that there is a waveform
> monitor
> > > that is able to check file based deliveries for issues like - 2 mono
> tracks
> > > instead of a stereo, or bitrate too low, or other 'gotchas' with
> shipping
> > > master files instead of tape for broadcast? (thank heavens files are so
> > > much better than tape)
> > > > > > >
> > > > > > > I thank the L-2's collective memory in advance.
> > > > > > >
> > > > > > >
> > > > > > > Jeff
> > > > > > >
> > > > > > > ------------------
> > > > > > > Jeff Hedberg
> > > > > > > Union Editorial
> > > > > > > 575 Broadway
> > > > > > > 6th floor
> > > > > > > New York, NY 10012
> > > > > > >
> > > > > >
> > > > > >
> > > > >
> > > > >
> > > > >
> > > > > [Non-text portions of this message have been removed]
> > > > >
> > > >
> > >
> > >
> > >
> >
> >
> > [Non-text portions of this message have been removed]
> >
>
>
>


[Non-text portions of this message have been removed]



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